Finding the Fourth Proportional to 2,185.72, 3,016.29 and 1,190.99

Step by Step Solution

1. Step 1: Write the proportion equation
   2,185.72 : 3,016.29 = 1,190.99 : x
2. Step 2: Convert to fraction form
   2,185.72/3,016.29 = 1,190.99/x
3. Step 3: Cross multiply
   2,185.72x = 3,016.29 × 1,190.99
4. Step 4: Simplify right side
   2,185.72x = 3,592,383.31
5. Step 5: Solve for x
   x = 3,592,383.31/2,185.72
6. Step 6: Final answer
   x = 1,643.57